Topological and shape optimization of thrust bearings for enhanced load-carrying capacity

The optimum shape of hydrodynamic film that provides the greatest load-carrying capacity (LCC) in sectorial-shape thrust bearings is obtained using sequential quadratic programming (SQP). Also presented are three suboptimum solutions for special cases of 2D step profile, constant film thickness in the radial direction and constant film depth with quadrilateral shape. These configurations are particularly attractive because they can be easily manufactured. Results reveal that optimally designed bearings can achieve more than 100% increase in LCC compared to the conventional inclined pad or step bearings.

► Global-optimum shape of hydrodynamic film in thrust bearings is determined.
► Guidelines for optimum design of thrust bearings are presented.
► Optimally designed bearings have up to 100% more load-carrying capacity (LCC).
► Formulations for the maximum LCC of a pad with specified dimensions are presented.